Data-driven insights for local properties

📊 Environmental Assessment Report

This comprehensive report analyzes both flood risk and industrial pollution exposure for this property. The assessment combines multiple data sources including USGS elevation, FEMA flood zones, historical storm modeling, and EPA Toxic Release Inventory records.

🌊 Part 1: Flood Risk Analysis

Property Overview

This section shows the fundamental characteristics of the property, including its elevation above sea level, FEMA flood zone designation, and our calculated overall flood risk rating based on historical data and topographic analysis.

Address
11311 N H ST LA PORTE 77571
Building Size
2,150 sqft
Total structure area from HCAD building records.
Elevation
22.17 ft
Height above sea level from USGS data.
FEMA Flood Zone
X
Moderate to Low Risk - Outside 500-year floodplain
Overall Risk
Very Low
Risk based on FEMA zone and simulation.

Risk Assessment Outputs

These detailed metrics show the technical outputs from our flood risk model. They include predicted water depths at the property during a 5000-year flood event and estimated flood damage based on USACE methodology.

Risk Rating
Very Low
Flood Depth
0 ft ±0.5 ft
No flooding at current water level.
Water Surface Elevation (WSE)
N/A
Water surface elevation data not available.
Area Inundated
N/A
Data not available
Nearest Bayou Stage
N/A
No nearby bayou within monitoring range
Depth-Damage Estimate (HCAD Valuation)
$0
Property not flooded at current water level. No damage to calculate.
Depth-Damage Estimate (Neighborhood Comparison)
$0
Property not flooded at current water level. No damage to calculate.
Analysis Method
COG Bathtub Model
Raster-based flood inundation query

Flood Simulation

This simulation shows whether the property would flood based on a 5000-year flood event with 3m (9.84ft) water level. Use the interactive tool to explore different scenarios.

✅ Property Would Be Safe
Safety Margin: 12.17 feet
Severity: Safe

Adjust Flood Simulation

The analysis above uses default settings (5000-year flood, 3m/9.84ft water level). To explore different flood scenarios with interactive maps, return to the main tool:

Open Interactive Analysis Tool

Flood Risk Recommendations

Based on the property's flood risk profile, here are specific action items to consider.

  • FEMA Zone X (minimal hazard) - flood insurance available at preferred rates.
  • Review the interactive flood simulator to understand how different rainfall events could affect this property.
  • Contact Harris County Flood Control District (HCFCD) for drainage projects and flood information.

🏭 Part 2: Industrial Pollution Exposure

Property Pollution Ranking
High
Higher pollution than 81% of Houston homes
This ranking compares pollution levels within 2 miles of this property against 10,000 randomly sampled Houston metro properties. Lower percentiles indicate higher pollution exposure.
Industrial Pollution Nearby (Last 10 Years)
1.08 million lbs
Extremely High
164.9x more than typical Houston property
≈ 54 dump trucks of chemicals within 2 miles
Total chemical releases from all industrial facilities within a 2-mile radius over the past decade (2014–2024). Data from EPA's Toxic Release Inventory tracking air, water, and land discharges.
💨 Air Pollution (Last 10 Years)
1.08 million lbs
Extremely High
223.0x more than typical Houston property
Chemicals released into the air from nearby facilities over 10 years. Includes both fugitive emissions (leaks, evaporation) and stack emissions (smokestacks, vents). May affect local air quality.
💧 Water Pollution (Last 10 Years)
170 lbs
High
Most Houston properties have none nearby
Chemical discharges to surface water (bayous, streams, drainage) from industrial facilities within 2 miles over the past decade. May impact local waterways and drainage systems.

❤️ Why It Matters

High chemical activity nearby can indicate industrial zones, truck traffic, or potential odor and noise issues. These factors may affect air quality, long-term property desirability, and neighborhood character. This data helps you understand the industrial footprint around your property.

🏙️ Houston Metro Benchmarks

Comparison with typical Houston properties (based on 10,000 randomly sampled homes). All measurements are for chemicals released within a 2-mile radius.

PeriodTotalAirWater
Typical Houston Property (2014-2024)6,524 lbs4,822 lbs0 lbs
This Property (2014-2024)1,075,740 lbs1,075,570 lbs170 lbs
Typical Houston Property (2024 Only)2 lbs1 lbs0 lbs
This Property (2024 Only)1,971,432 lbs77,439 lbs0 lbs

📊 How This Property Compares to Houston Metro

Based on a random sample of 10,000 Houston properties, this chart shows the distribution of pollution levels across the metro area. The highlighted bar indicates where this property falls compared to other homes. Lower percentiles mean higher pollution exposure.

0-9thMost Polluted
9.9%
10-19th
10.1%
20-29th
9.9%
30-39th
10.1%
40-49th
9.7%
50-59th
10.2%
60-69th
6%
70-79th
5.8%
80-89th
4.3%
90-100thLowest Pollution
34.2%
Higher pollution than 81% of Houston homes
Each bar's width represents the percentage of Houston homes in that pollution range. This property ranks in the 20-29th percentile (top 25% most polluted).

Top chemicals released near this property (past 10 years):

Methanol, Ethylene, Vinyl acetate, Xylene (mixed isomers), Formaldehyde

View the full list of 35 chemicals below.

Chemicals Released (2014-2024, 10-Year Total) (35 chemicals)

#ChemicalCAS#Air (lbs, 10yr)Water (lbs, 10yr)Total (lbs, 10yr)
1Methanol67-56-1461,298 lbs0 lbs461,298 lbs
2Ethylene74-85-1312,775 lbs0 lbs312,775 lbs
3Vinyl acetate108-05-4102,664 lbs0 lbs102,664 lbs
4Xylene (mixed isomers)1330-20-754,400 lbs0 lbs54,400 lbs
5Formaldehyde50-00-036,691 lbs102 lbs36,794 lbs
6Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-033,058 lbs0 lbs33,058 lbs
7Ammonia7664-41-718,956 lbs68 lbs19,024 lbs
8Ethylene glycol107-21-116,752 lbs0 lbs16,752 lbs
9Chlorine7782-50-511,230 lbs0 lbs11,230 lbs
10Maleic anhydride108-31-65,570 lbs0 lbs5,570 lbs
11Propylene115-07-14,500 lbs0 lbs4,500 lbs
12Chloroacetic acid79-11-84,175 lbs0 lbs4,175 lbs
13Mercury7439-97-60 lbs0 lbs2,200 lbs
14Phosgene75-44-51,958 lbs0 lbs1,958 lbs
15Aluminum oxide (fibrous forms)1344-28-11,750 lbs0 lbs1,750 lbs
16Ethyl chloroformate541-41-31,467 lbs0 lbs1,467 lbs
17Methyl chlorocarbonate79-22-11,449 lbs0 lbs1,449 lbs
18sec-Butyl alcohol78-92-21,434 lbs0 lbs1,434 lbs
19n-Butyl alcohol71-36-31,165 lbs0 lbs1,165 lbs
201,2,4-Trimethylbenzene95-63-6971 lbs0 lbs971 lbs
21Toluene108-88-3807 lbs0 lbs807 lbs
22Ethylene oxide75-21-8791 lbs0 lbs791 lbs
23Manganese7439-96-5511 lbs0 lbs511 lbs
24Cyclohexane110-82-7377 lbs0 lbs377 lbs
25Ethylbenzene100-41-4310 lbs0 lbs310 lbs
26Naphthalene91-20-3278 lbs0 lbs278 lbs
27Cumene98-82-868 lbs0 lbs68 lbs
28Chloromethane74-87-351 lbs0 lbs51 lbs
29Chromium7440-47-345 lbs0 lbs45 lbs
30N,N-Dimethylformamide68-12-234 lbs0 lbs34 lbs
31Propylene oxide75-56-914 lbs0 lbs14 lbs
32Acetaldehyde75-07-010 lbs0 lbs10 lbs
33Bis(2-chloroethyl) ether111-44-43 lbs0 lbs3 lbs
34Certain glycol ethersN2303 lbs0 lbs3 lbs
35Methyl methacrylate80-62-62 lbs0 lbs2 lbs

Top chemicals released near this property (2024 only):

Methanol, Aluminum oxide (fibrous forms), Maleic anhydride, 1,2,4-Trimethylbenzene, Chloroacetic acid

View the full list of 28 chemicals reported within 2 miles for 2024.

Chemicals Released (2024 Only) (28 chemicals)

#ChemicalCAS#Air (lbs/yr)Water (lbs/yr)Total (lbs/yr)
1Methanol67-56-144,249 lbs0 lbs1,312,696 lbs
2Aluminum oxide (fibrous forms)1344-28-1250 lbs0 lbs353,010 lbs
3Maleic anhydride108-31-61,569 lbs0 lbs135,289 lbs
41,2,4-Trimethylbenzene95-63-674 lbs0 lbs43,988 lbs
5Chloroacetic acid79-11-8476 lbs0 lbs20,694 lbs
6Vinyl acetate108-05-46,880 lbs0 lbs20,379 lbs
7Xylene (mixed isomers)1330-20-71,183 lbs0 lbs14,402 lbs
8Toluene108-88-316 lbs0 lbs13,930 lbs
9Nonylphenol EthoxylatesN5350 lbs0 lbs11,809 lbs
10Ethylene74-85-19,510 lbs0 lbs9,510 lbs
11Formaldehyde50-00-03,562 lbs0 lbs6,312 lbs
12Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)7647-01-06,255 lbs0 lbs6,255 lbs
13Naphthalene91-20-3245 lbs0 lbs4,285 lbs
14sec-Butyl alcohol78-92-293 lbs0 lbs3,447 lbs
15Ethylbenzene100-41-4220 lbs0 lbs2,846 lbs
16Ethylene oxide75-21-863 lbs0 lbs2,763 lbs
17Cumene98-82-84 lbs0 lbs2,713 lbs
18n-Butyl alcohol71-36-375 lbs0 lbs2,529 lbs
19Ammonia7664-41-7897 lbs0 lbs1,323 lbs
20Ethylene glycol107-21-11 lbs0 lbs1,139 lbs
21Chlorine7782-50-51,121 lbs0 lbs1,121 lbs
22Propylene115-07-1500 lbs0 lbs500 lbs
23Cyclohexane110-82-724 lbs0 lbs315 lbs
24Ethyl chloroformate541-41-3120 lbs0 lbs120 lbs
25Phosgene75-44-527 lbs0 lbs27 lbs
26Acetaldehyde75-07-010 lbs0 lbs15 lbs
27Methyl chlorocarbonate79-22-113 lbs0 lbs13 lbs
28Propylene oxide75-56-91 lbs0 lbs1 lbs

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